Musannaf Ibn Abi Shayba 3:591

Ghundar narrated to us, from Shu'bah, from Abu al-Nadr, who said: I heard Jabalah ibn Abd al-Rahman, from Muslim, who said: Ubadah saw a man who was not completing his bowing (ruku') or his prostration (sujud), so he took him by the hand. The man became alarmed. Ubadah said: "Do not resemble this man, nor those like him; for his prayer is not sufficient except with the Mother of the Book (Al-Fatiha)."